🦠microbiology review

Spirillum minor

Written by the Fiveable Content Team • Last updated August 2025
Written by the Fiveable Content Team • Last updated August 2025

Definition

Spirillum minor is a Gram-negative, spiral-shaped bacterium known for causing rat-bite fever. It is typically transmitted through bites or scratches from infected rodents.

5 Must Know Facts For Your Next Test

  1. Spirillum minor causes rat-bite fever, also known as sodoku.
  2. It is a Gram-negative bacterium with a characteristic spiral shape.
  3. The incubation period for infection ranges from one to three weeks post-exposure.
  4. Symptoms often include fever, muscle pain, and ulceration at the site of the bite.
  5. Diagnosis is generally confirmed through serological tests and culture of the bacteria.

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